Hot-blast stove



July 10, 1923- 11451357 F. E. KLING HOT BLAST STOVE Filed June 27, 1922 3 Sheets-Sheet l Wines-6'86: 6 7 V In 067? for;

F. E. KLIKNG July 10, 1923' HOT BLAST STOVE 3 Sheets-Sheet 2 Filed June 27. 1922 DUDE-S iiiness'es July 10, 1923' F. E. KLING HOT BLAST STOVE Filed June 27, 1922 3 Sheets-Sheet 5 m .t/ v w AA W w y A F 0 w a l\ )\J rga Wines-sea:

ZQWLQM Patented 'July 10, 1923.-

' UNITE STATE-S PATENT o FFlCE.-

FRED E. KLING, OF YOUNGSTOWN, 0 310.

HOT-BLAST STOVE.

Application filed June 21, 1922. Serial in. 571,181.

To all whom, it may concern:

Be it known that I Fan!) E; KLING, a citizen of the United tates, and resident of Y0 stown', inythe county of Mahoning and tate of Ohio, have invented certain new and useful Improvements in Hot-Blast Stoves, of which the following is a specifiwork baflle above the vertical checkers adapted to catch and remove some of the dust and dirt carried in the gases used in heating the stove, and to also cause a more even distribution of the gases through the vertical checkerwork. 4 s

' A still further object is to provide a hot blast stove having the novel construction,

combination of parts, and design set forth int'he following specification and illustrated in the accompanying drawings, in which-1 Figure 1; is a vertical section through a stove constructed in accordance with this invention. 1

Figure 2 is a vertical section through the upper portion of a central'combustion cham-.

ber stove constructed in accordance with this invention. .7

Figure 3 is a somewhat diagrammatic section of checkerwork constructed in accordance with my invention.

Figure 4 is a plan View of a portion of checkerwork. v

.The stove illustrated is as a whole a well known design, the improvement being in the checkerwork construction. The stove comprises a cylindrical side wall composed of an outer metal shell 2 and a brick lining wall 3, a dome-shaped top composed of an outer metal shell portion 4 and inner brick wall 5, and a bottom wall composed of an outer metal shell 6 and an inner wall 7. The shells 2,

' 4-and 6 are all secured together by riveting or otherwise to form a rigid structure, an

the brick lining walls 3, 5 and 7 are all built integral. The stove is provided with the usual combustion chamber 8 and vertical checkerwork flues 9. The checkerwork 9 is supported on an arch 10 which forms a dis tributing chamber at the bottom of the stove, which communicates with the usual arched distributing channels 11 adapted to evenly distribute the blast through the checkers.

A hot blastoutlet and gas inlet 12 is formed in the side wall of the stove and communicates with the combustion chamber 8, and a'cold blast inlet 13 is formed in the side wall of the stove and communicates through the distributing chamber with thelower end of the checkerwork flues 9.

The chamber formed by the arch 10 also servesas an outlet for the burnt gases which pass through suitable passageways 14 to the flues leading to the stack (not shown), said .flues being closed when the stove is in blast.

The top wall composed of the shell portion 4 and brickliningb is so formed that a space 15 is left between the shell 4 and wall 5, therefore, leaving room for expansion of the brick walls of the furnace when it is heated. v

-The vertical checker-work flues 9 have their side walls tapered orreduced in-cross section from a point 16 intermediate their ends totheir tops and their upper ends are tapered to a still thinner cross section at 17 forming wedge shaped upper ends. The thinning or reducing of the side walls of the vertical checkerwork flues 9 serves to enlarge the uppeg ends of the flues and to,- therefore, increase the length of time the stove may be operated before said flues be.-

come clogged by the dust and. dirt which collects or adheres to the upper portion of the flues 9 and becomes sintered thereon;

A plurality of horizontal checkerwork flues 18 are built above the flues 9 and serve to separate the combination chamber 8 and vertical flues 9. The flues 18 are materially larger than the flues 9 and serve as baflles for the gases passing from the chamber 8 into the flues 9. The flues 18 also serve to bafile out a considerable portion of the dust and dirt carried by the gases, and to cause a more even distribution of the gases in the flues 9.

The central combustion stove shown in Figure 2 has vertical checkerwork flues '9 and horizontal checkerwor flues 18 constructed in accordance with this invention, as illustrated in Figures 1, 3 and 4, the only difierence being that in the sidecombustion stove of Figure 1 the horizontal checkerwork fines are formed as a curved wall across the stove, since the combustion chamher is to the one side of the stove, While in the central combustion chamber stove of Figure 2 the horizontal checkerwork fiues 18 form a complete circle around the central combustion chamber.

The advantages of this invention will be readily apparent to those skilled in the art.

By constructing the checkerwork in accordance with this invention the length of time a .stove can be kept in uninterrupted operation is increased. Assuming, for instance, thatwith a four inch vertical flue the stove has to be taken off after the fiues have been decreased by the accumulation of sintered dust to 2 inches, the flue area lost by the dust is 4 +2 or 12 square inches Now assuming that the'flue walls reduced so as to increase their area from 4 to 4?} inches for a short length and then further decreased so as to increase the area of the fiues to 6 inches, the area lost would be 6 -2 =32 square inches, which shows that it would require 32/12 or 2% as much time to reduce the area. of the flues to 2 square inches or to the minimum size at which the stove can be operated successfully. It will be understood that while the fiues are enlarged to 6 inches for only a short distance and decreased to 4% inches and then to 4 inches, that the dust accumulation also decreases and, therefore, the reduction in fine area is approximately equal along the fiues.

The above figures are based upon the stove without taking the horizontal fiues 18 into consideration and, therefore, since these fiues also serve to reduce the dust accumulation on the fiues 9 the length of time that the stove may be operatedwithout becoming clogge'd will be still further increased.

1. In a hot blast stove, a plurality of relatively small vertical flues forming Vertical checkerwork, said fiues having their walls reduced in thickness from a point intermediate their ends to their top and having wedgeshaped tops, and a plurality of relatively large horizontal fiues forming horizontal checkerwork above said vertical fiues, said horizontal checkerwork communicating with the combustion chamber and with the distributing chamber above said vertical flues, all substantially as and for the purpose described.

2. In a hot blast stove, a plurality of relatively small vertical fiues forming vertical checkerwork, and a plurality of relatively large horizontal fiues forming horizontal checkerwork above said vertical fiues, said horizontal checkerwork communicating with the combustion chamber and the distributing chamber above said vertical fiues, all

meme? substantially as and for the purpose described.

3. In a hot blast stove, having a combustion chamber and a distributin chamber, a plurality of vertical lines formlng vertical checkerwork, said fiues having their walls reduced in cross section from a int intermediate their ends to a point ad acent their upper end and having their upper ends tapered to a still thinner cross section forming wedge shaped upper ends, to enlarge the diameter of said fiues and materially increase the length of time said fiues may be operated before they become clogged by the accumulation of dust and dirt deposited thereon by the gases.

4. In a hot blast stove, having a combustion chamber and a distributing chamber, a plurality of vertical fiues forming vertical checkerwork, said flues having their walls reduced in cross section from a point intermediate their ends to a point adjacent their upper end and having their upper ends tapered to a still thinner cross section forming wedge shaped upper ends, and means above said checkerwork for removin and catching some of the dust and dirt 1n the gases before they enter said checkerwork.

5. In a hot blast stove, having a combustion chamber and a distributin chamber, a plurality of vertical fiues forming vertical checkerwork, said fiues having their walls reduced in cross section from a point intermediate their ends to a point adjacent their 'upper end, and having their upper ends tapere d to a still thinner cross section forming wedge shaped upper ends, and horizontal checkerwork above said vertical fiues, said horizontal checkerwork being adapted to baflle the gases before they enter said vertical flues, thereby removing a portion of the dust and dirt carried by said gases prior to their entering said Vertical flues and also causing an even distribution of gases to said vertical fiues.

6. In a hot blast stove, having a combustion chamber and a distributing chamber, a-

, plurality of vertical fiues forming vertical checkerwork, said fiues having their walls reduced in cross section from a point intermediate their ends to a point adjacent their upper end, and having their upper ends tapered to a still thinner cross section formmg wedge shaped upper ends, and horizon tal fiues forming horizontal checkerwork above said vertical fiues, said horizontal fiues having a greater cross sectional area than said vertical fiues, communicating with the combustion chamber and with the distributing chamber of said stove and being adapted to bafile the gases before they enter said vertical fiues.

In testimony whereof I have hereunto set an hand.

y FRED E, KLING. 

